|
0
|
1 module dmd.StructInitializer;
|
|
|
2
|
|
|
3 import dmd.Initializer;
|
|
2
|
4 import dmd.TOK;
|
|
67
|
5 import dmd.TypeSArray;
|
|
2
|
6 import dmd.FuncLiteralDeclaration;
|
|
|
7 import dmd.TypeFunction;
|
|
56
|
8 import dmd.StructDeclaration;
|
|
|
9 import dmd.StructLiteralExp;
|
|
0
|
10 import dmd.ArrayTypes;
|
|
|
11 import dmd.Array;
|
|
|
12 import dmd.Loc;
|
|
|
13 import dmd.Type;
|
|
|
14 import dmd.Scope;
|
|
|
15 import dmd.Identifier;
|
|
2
|
16 import dmd.CompoundStatement;
|
|
0
|
17 import dmd.AggregateDeclaration;
|
|
|
18 import dmd.OutBuffer;
|
|
|
19 import dmd.HdrGenState;
|
|
|
20 import dmd.Expression;
|
|
2
|
21 import dmd.TypeStruct;
|
|
|
22 import dmd.TY;
|
|
|
23 import dmd.VarDeclaration;
|
|
|
24 import dmd.Dsymbol;
|
|
|
25 import dmd.Util;
|
|
|
26 import dmd.ExpInitializer;
|
|
|
27 import dmd.FuncExp;
|
|
|
28 import dmd.LINK;
|
|
0
|
29
|
|
|
30 import dmd.backend.dt_t;
|
|
67
|
31 import dmd.backend.Util;
|
|
0
|
32
|
|
|
33 class StructInitializer : Initializer
|
|
|
34 {
|
|
|
35 Identifiers field; // of Identifier *'s
|
|
|
36 Initializers value; // parallel array of Initializer *'s
|
|
|
37
|
|
|
38 Array vars; // parallel array of VarDeclaration *'s
|
|
|
39 AggregateDeclaration ad; // which aggregate this is for
|
|
|
40
|
|
|
41 this(Loc loc)
|
|
|
42 {
|
|
|
43 super(loc);
|
|
2
|
44 ad = null;
|
|
|
45
|
|
|
46 field = new Identifiers();
|
|
|
47 value = new Initializers();
|
|
51
|
48
|
|
|
49 vars = new Array();
|
|
0
|
50 }
|
|
|
51
|
|
72
|
52 override Initializer syntaxCopy()
|
|
0
|
53 {
|
|
2
|
54 StructInitializer ai = new StructInitializer(loc);
|
|
|
55
|
|
|
56 assert(field.dim == value.dim);
|
|
|
57 ai.field.setDim(field.dim);
|
|
|
58 ai.value.setDim(value.dim);
|
|
|
59 for (int i = 0; i < field.dim; i++)
|
|
|
60 {
|
|
|
61 ai.field.data[i] = field.data[i];
|
|
|
62
|
|
|
63 Initializer init = cast(Initializer)value.data[i];
|
|
|
64 init = init.syntaxCopy();
|
|
|
65 ai.value.data[i] = cast(void*)init;
|
|
|
66 }
|
|
|
67
|
|
|
68 return ai;
|
|
0
|
69 }
|
|
|
70
|
|
|
71 void addInit(Identifier field, Initializer value)
|
|
|
72 {
|
|
2
|
73 //printf("StructInitializer.addInit(field = %p, value = %p)\n", field, value);
|
|
|
74 this.field.push(cast(void*)field);
|
|
|
75 this.value.push(cast(void*)value);
|
|
0
|
76 }
|
|
|
77
|
|
72
|
78 override Initializer semantic(Scope sc, Type t)
|
|
0
|
79 {
|
|
2
|
80 TypeStruct ts;
|
|
|
81 int errors = 0;
|
|
|
82
|
|
|
83 //printf("StructInitializer.semantic(t = %s) %s\n", t.toChars(), toChars());
|
|
|
84 vars.setDim(field.dim);
|
|
|
85 t = t.toBasetype();
|
|
|
86 if (t.ty == Tstruct)
|
|
|
87 {
|
|
|
88 uint i;
|
|
|
89 uint fieldi = 0;
|
|
|
90
|
|
|
91 ts = cast(TypeStruct)t;
|
|
|
92 ad = ts.sym;
|
|
|
93 for (i = 0; i < field.dim; i++)
|
|
|
94 {
|
|
|
95 Identifier id = cast(Identifier)field.data[i];
|
|
|
96 Initializer val = cast(Initializer)value.data[i];
|
|
|
97 Dsymbol s;
|
|
|
98 VarDeclaration v;
|
|
|
99
|
|
|
100 if (id is null)
|
|
|
101 {
|
|
|
102 if (fieldi >= ad.fields.dim)
|
|
|
103 {
|
|
|
104 error(loc, "too many initializers for %s", ad.toChars());
|
|
|
105 field.remove(i);
|
|
|
106 i--;
|
|
|
107 continue;
|
|
|
108 }
|
|
|
109 else
|
|
|
110 {
|
|
79
|
111 s = ad.fields[fieldi];
|
|
2
|
112 }
|
|
|
113 }
|
|
|
114 else
|
|
|
115 {
|
|
|
116 //s = ad.symtab.lookup(id);
|
|
|
117 s = ad.search(loc, id, 0);
|
|
|
118 if (!s)
|
|
|
119 {
|
|
|
120 error(loc, "'%s' is not a member of '%s'", id.toChars(), t.toChars());
|
|
|
121 continue;
|
|
|
122 }
|
|
|
123
|
|
|
124 // Find out which field index it is
|
|
|
125 for (fieldi = 0; 1; fieldi++)
|
|
|
126 {
|
|
|
127 if (fieldi >= ad.fields.dim)
|
|
|
128 {
|
|
|
129 s.error("is not a per-instance initializable field");
|
|
|
130 break;
|
|
|
131 }
|
|
79
|
132 if (s == ad.fields[fieldi])
|
|
2
|
133 break;
|
|
|
134 }
|
|
|
135 }
|
|
|
136 if (s && (v = s.isVarDeclaration()) !is null)
|
|
|
137 {
|
|
|
138 val = val.semantic(sc, v.type);
|
|
|
139 value.data[i] = cast(void*)val;
|
|
|
140 vars.data[i] = cast(void*)v;
|
|
|
141 }
|
|
|
142 else
|
|
|
143 {
|
|
|
144 error(loc, "%s is not a field of %s", id ? id.toChars() : s.toChars(), ad.toChars());
|
|
|
145 errors = 1;
|
|
|
146 }
|
|
|
147 fieldi++;
|
|
|
148 }
|
|
|
149 }
|
|
|
150 else if (t.ty == Tdelegate && value.dim == 0)
|
|
|
151 {
|
|
|
152 /* Rewrite as empty delegate literal { }
|
|
|
153 */
|
|
|
154 Arguments arguments = new Arguments;
|
|
|
155 Type tf = new TypeFunction(arguments, null, 0, LINK.LINKd);
|
|
|
156 FuncLiteralDeclaration fd = new FuncLiteralDeclaration(loc, Loc(0), tf, TOK.TOKdelegate, null);
|
|
|
157 fd.fbody = new CompoundStatement(loc, new Statements());
|
|
|
158 fd.endloc = loc;
|
|
|
159 Expression e = new FuncExp(loc, fd);
|
|
|
160 ExpInitializer ie = new ExpInitializer(loc, e);
|
|
|
161 return ie.semantic(sc, t);
|
|
|
162 }
|
|
|
163 else
|
|
|
164 {
|
|
|
165 error(loc, "a struct is not a valid initializer for a %s", t.toChars());
|
|
|
166 errors = 1;
|
|
|
167 }
|
|
|
168 if (errors)
|
|
|
169 {
|
|
|
170 field.setDim(0);
|
|
|
171 value.setDim(0);
|
|
|
172 vars.setDim(0);
|
|
|
173 }
|
|
|
174 return this;
|
|
0
|
175 }
|
|
|
176
|
|
56
|
177 /***************************************
|
|
|
178 * This works by transforming a struct initializer into
|
|
|
179 * a struct literal. In the future, the two should be the
|
|
|
180 * same thing.
|
|
|
181 */
|
|
72
|
182 override Expression toExpression()
|
|
0
|
183 {
|
|
56
|
184 Expression e;
|
|
|
185
|
|
|
186 //printf("StructInitializer.toExpression() %s\n", toChars());
|
|
|
187 if (!ad) // if fwd referenced
|
|
|
188 {
|
|
|
189 return null;
|
|
|
190 }
|
|
|
191 StructDeclaration sd = ad.isStructDeclaration();
|
|
|
192 if (!sd)
|
|
|
193 return null;
|
|
|
194 Expressions elements = new Expressions();
|
|
|
195 for (size_t i = 0; i < value.dim; i++)
|
|
|
196 {
|
|
|
197 if (field.data[i])
|
|
|
198 goto Lno;
|
|
|
199 Initializer iz = cast(Initializer)value.data[i];
|
|
|
200 if (!iz)
|
|
|
201 goto Lno;
|
|
|
202 Expression ex = iz.toExpression();
|
|
|
203 if (!ex)
|
|
|
204 goto Lno;
|
|
|
205 elements.push(cast(void*)ex);
|
|
|
206 }
|
|
|
207 e = new StructLiteralExp(loc, sd, elements);
|
|
|
208 e.type = sd.type;
|
|
|
209 return e;
|
|
|
210
|
|
|
211 Lno:
|
|
|
212 delete elements;
|
|
|
213 //error(loc, "struct initializers as expressions are not allowed");
|
|
|
214 return null;
|
|
0
|
215 }
|
|
|
216
|
|
72
|
217 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
|
|
0
|
218 {
|
|
|
219 assert(false);
|
|
|
220 }
|
|
|
221
|
|
72
|
222 override dt_t* toDt()
|
|
0
|
223 {
|
|
67
|
224 scope Array dts = new Array();
|
|
|
225 uint i;
|
|
|
226 uint j;
|
|
|
227 dt_t* dt;
|
|
|
228 dt_t* d;
|
|
|
229 dt_t** pdtend;
|
|
|
230 uint offset;
|
|
|
231
|
|
|
232 //printf("StructInitializer.toDt('%s')\n", toChars());
|
|
|
233 dts.setDim(ad.fields.dim);
|
|
|
234 dts.zero();
|
|
|
235
|
|
|
236 for (i = 0; i < vars.dim; i++)
|
|
|
237 {
|
|
|
238 VarDeclaration v = cast(VarDeclaration)vars.data[i];
|
|
|
239 Initializer val = cast(Initializer)value.data[i];
|
|
|
240
|
|
|
241 //printf("vars[%d] = %s\n", i, v.toChars());
|
|
|
242
|
|
|
243 for (j = 0; 1; j++)
|
|
|
244 {
|
|
|
245 assert(j < dts.dim);
|
|
79
|
246 //printf(" adfield[%d] = %s\n", j, ((VarDeclaration *)ad.fields[j]).toChars());
|
|
|
247 if (cast(VarDeclaration)ad.fields[j] == v) // TODO: check if 'is' needs to be used here
|
|
67
|
248 {
|
|
|
249 if (dts.data[j])
|
|
|
250 error(loc, "field %s of %s already initialized", v.toChars(), ad.toChars());
|
|
|
251 dts.data[j] = cast(void*)val.toDt();
|
|
|
252 break;
|
|
|
253 }
|
|
|
254 }
|
|
|
255 }
|
|
|
256
|
|
|
257 dt = null;
|
|
|
258 pdtend = &dt;
|
|
|
259 offset = 0;
|
|
|
260 for (j = 0; j < dts.dim; j++)
|
|
|
261 {
|
|
79
|
262 VarDeclaration v = cast(VarDeclaration)ad.fields[j];
|
|
67
|
263
|
|
|
264 d = cast(dt_t*)dts.data[j];
|
|
|
265 if (!d)
|
|
|
266 {
|
|
|
267 // An instance specific initializer was not provided.
|
|
|
268 // Look to see if there's a default initializer from the
|
|
|
269 // struct definition
|
|
|
270 if (v.init)
|
|
|
271 {
|
|
|
272 d = v.init.toDt();
|
|
|
273 }
|
|
|
274 else if (v.offset >= offset)
|
|
|
275 {
|
|
|
276 uint k;
|
|
|
277 uint offset2 = v.offset + cast(uint)v.type.size();
|
|
|
278 // Make sure this field does not overlap any explicitly
|
|
|
279 // initialized field.
|
|
|
280 for (k = j + 1; 1; k++)
|
|
|
281 {
|
|
|
282 if (k == dts.dim) // didn't find any overlap
|
|
|
283 {
|
|
|
284 v.type.toDt(&d);
|
|
|
285 break;
|
|
|
286 }
|
|
79
|
287 VarDeclaration v2 = cast(VarDeclaration)ad.fields[k];
|
|
67
|
288
|
|
|
289 if (v2.offset < offset2 && dts.data[k])
|
|
|
290 break; // overlap
|
|
|
291 }
|
|
|
292 }
|
|
|
293 }
|
|
|
294 if (d)
|
|
|
295 {
|
|
|
296 if (v.offset < offset)
|
|
|
297 error(loc, "duplicate union initialization for %s", v.toChars());
|
|
|
298 else
|
|
|
299 {
|
|
|
300 uint sz = dt_size(d);
|
|
|
301 uint vsz = cast(uint)v.type.size();
|
|
|
302 uint voffset = v.offset;
|
|
|
303
|
|
|
304 uint dim = 1;
|
|
|
305 for (Type vt = v.type.toBasetype();
|
|
|
306 vt.ty == Tsarray;
|
|
|
307 vt = vt.nextOf().toBasetype())
|
|
|
308 {
|
|
|
309 TypeSArray tsa = cast(TypeSArray)vt;
|
|
|
310 dim *= tsa.dim.toInteger();
|
|
|
311 }
|
|
|
312 assert(sz == vsz || sz * dim <= vsz);
|
|
|
313
|
|
|
314 for (size_t k = 0; k < dim; k++)
|
|
|
315 {
|
|
|
316 if (offset < voffset)
|
|
|
317 pdtend = dtnzeros(pdtend, voffset - offset);
|
|
|
318 if (!d)
|
|
|
319 {
|
|
|
320 if (v.init)
|
|
|
321 d = v.init.toDt();
|
|
|
322 else
|
|
|
323 v.type.toDt(&d);
|
|
|
324 }
|
|
|
325 pdtend = dtcat(pdtend, d);
|
|
|
326 d = null;
|
|
|
327 offset = voffset + sz;
|
|
|
328 voffset += vsz / dim;
|
|
|
329 if (sz == vsz)
|
|
|
330 break;
|
|
|
331 }
|
|
|
332 }
|
|
|
333 }
|
|
|
334 }
|
|
|
335
|
|
|
336 if (offset < ad.structsize)
|
|
|
337 dtnzeros(pdtend, ad.structsize - offset);
|
|
|
338
|
|
|
339 return dt;
|
|
0
|
340 }
|
|
|
341
|
|
72
|
342 override StructInitializer isStructInitializer() { return this; }
|
|
|
343 }
|
